Utility knife



FIG. 1 is a front view of a utility knife showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a perspective view thereof; and,

FIG. 8 is another perspective view thereof showing a status when the utility knife is closed.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for the utility knife, as shown and described. 